Seo Hyun Jin is a South Korean actress and singer. She was scouted by S.M. Entertainment and later debuted as the main vocalist of the South Korean girl group, M.I.L.K in 2001 and continued until the group disbanded in 2003. After M.I.L.K. was dissolved, Seo attended Dongduk Women’s University, where she majored in applied musicology to keep her dream of singing career alive. Seo contributed songs to a few soundtracks and SM Town compilations as a solo artist. She transitioned into acting in 2006.
Seo made her acting debut in the musical The Sound of Music (2006) then followed by appearances in several television series and films. She is best known for her leading roles as Oh Hae Young in the romantic comedy TV series Another Miss Oh (2016), which gained her wider recognition, medical melodrama Dr. Romantic (2016–2017) and romance dramas Temperature of Love (2017) and The Beauty Inside (2018).